Gradual deterioration of specific tissues, cells, or organs with corresponding impairment or loss of function, caused by injury, disease, or aging.
变性特定的组织、细胞或器官随着受伤、疾病或年老而导致的相应的功能的削弱或丧失，而形成的逐渐的变质
A process, condition, or period of deterioration or decline, as in morals or art; decay.
堕落在道德或艺术方面变坏，或衰落的过程、条件、或期间; 衰败
deterioration of intellectual faculties, such as memory, concentration, and judgment, resulting from an organic disease or a disorder of the brain. It is often accompanied by emotional disturbance and personality changes.
痴呆智力能力，例如记忆力、精神集中的能力、判断力等的恶化，常因某器官病疾或头脑紊乱，引起经常伴随着情感波动和性情的变化
